1. Package list: 2 hot air ducts, 2 heating vents, 4 hose clamps, and 1 threeway pipe. Suitable for 75 mm hot air ducts, effectively separates the warm airflow from the heater. Fits most outlet hoses, ensuring efficient distribution of hot air. 2. material: The heating ducts are made of aluminum foil, offering temperature resistance, corrosion resistance, and easy handling. Ideal for hot and cold air ducts in heating systems, serving as a replacement for old or damaged heating ducts. 3. quality heating pipe: Designed for 2 kW / 5 kW / 8 kW diesel air heaters, these ducts are suitable for cold, hot, and diesel heating applications. The 360° rotatable opening allows precise warm air direction. When using an air heater in your vehicle, this auxiliary hose directs warm air to keep your feet comfortable while driving in snow or cold weather. 4. Easy installation and use: Professionally designed for a fit without damaging your car. Features ventilation openings for efficient airflow distribution. The removable front plate provides access to screw holes for proper installation. The 360° rotatable panel directs warm air as needed. The intake pipe is designed for noise reduction, minimizing operational noise.